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Old 05-19-2013, 07:38 PM   #1
Registered User
Join Date: Jul 2007
Location: Miami, Florida, USA
Posts: 75
My Ride: E46 M3 CONV
E46 3-Series Audio System Harness upgrade (also Harman Kardon upgrade)

Dear BMW Sound Enthusiasts,

If you want to replace the weak underpowered OEM sound system amplifier in your car and also use the existing speaker wiring in the car, you'll need to access the amplifier harness with this kit.

No OEM wires to cut. Just easily solder on your preferred wires to the kit and connect to your new amplifier (three wires soldered on as an example in pictures).

First, remove the OEM amplifier (black metal box located in rear) and install this connector kit which I designed after replacing every speaker in my car with higher quality aftermarker ones along with a much more powerful aftermarket amplifer.

Fits: 1999-2006 E46 3-Series and M3 HiFi (standard) and Harman Kardon (optional premium) sound system OEM amp.
May also fit some E90-E92 M3s. Please make sure that your harness looks like the one in the pictures to ensure fit.

Instructions are included as well as a pin guide that tells you what pin is connected to what speaker etc...

Price is $30 shipped in the USA. PayPal accepted.
(Will ship overseas for additional shipping fee.)

*NOTE ON POWER SUPPLY FROM THE HARNESS: Aftermarket amplifiers require a high current power connection to the 12 volt battery and ground. This kit's connections can provide power to aftermarket amp but not recommended since the gauge of the connectors in the harness is not suitable for most aftermarket amps which are generally higher powered and thus need more current and thicker wires/connectors. To get around this, you can connect your aftermarket amplifier directly to the battery and ground it at a metal point of the car's chassis. Easily done since the battery is in the back on most BMWs.
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